CH251199A - Stretch bracelet. - Google Patents

Description

Stretch bracelet. The pr6sssnte invention relates to an extendable bracelet, more particularly but not exclusively made of metal.

This bracelet is characterized in that each of its links presents the monk with two coaxial rotating bodies each comprising at least one eccentric pivot by which it is hinged to fun of the rotating bodies of a neighboring link, elastic means ten - constantly having to impart to said rotating organs a reciprocal rotational movement to bring the points of articulation closer together. others and, consequently, to shorten the bracelet.

The accompanying drawing shows three embodiments of the bracelet according to the invention, given by way of example.

fig. 1 shows in perspective a section of the bracelet according to the first embodiment.

fig. 2 shows, also in perspective, the main component parts of a link.

fig. 3 is an axial section of a link.

fig. 4 is a side view, on a larger scale, of three links of the bracelet in a state of rest.

fig. 5 shows these three links when the bracelet is in extension.

fig. 6 is a partial perspective view of the bracel@et according to the second form of execution. fig. 7 is a view in elevation of the bracelet according to the third embodiment, in the state of rest, FIG. 8 shows two links in the extended state.

The six links of the First embodiment, shown in FIG. 1, each consist of three main parts, a spring and a pin.

The three main parts are represented separately in FIG. 2 and comprise an elongated central body 1 having an oblong-shaped profile and two rotary members 2 and 3 each comprising an outer flange 4 and an inner cylindrical extension 5 intended to be introduced, at the rate of a . by end, in the first central hole 6 of the body 1.

The assembly of these constituent elements of each link is represented in longitudinal section in FIG. 3.

The two rotary organs 2 and 3 being set up at the two ends of the body 1, an internal spring 7 maintains them there by traction and fixed to a central pin, 8 fixed in the first body 1, serving as a fulcrum, constantly tends to impart to the organs 2 and 3 a rotational movement in the same direction, but opposite to that imparted by reaction to the cylindrical body 1, of which the pin 8 makes it integral.

Like the RTI ID="0001.0269" WI="8" HE="4" LX="1292" LY="2088"> body 1, the two rotary members 2 and 3 have an oblong profile, the extension of which includes means for - bearing with axis parallel to the axis of the central body. These means consist of a pin 9 fixed on each rotary member and a corresponding off-center hole 10 drilled in the edge of the carps 1 (see Fig. 2).

Looking at an end link, for example in the Position of fig. 2, the hole is offset to the left and the pin to the right. As a result, to assemble several links side by side, it suffices to introduce the two pins 9 of the rotating members into the holes of the central bodies.

The object obtained will have the appearance of the stub which is represented in perspective in FIG. 1. We see there six Tentral Bodies la,<I>l b,1 c,1</I> d,16, 1 f ending in front with the six Rotating Organs <I>2a, 2b, 2c,</I > 2t1, <I>2nd, 2 f</I> and had behind by the six opposed rotary Organs 3a, 3b, <B>3rd,</B> 3t1, 3e, 3f.

Each link as it is, 2a, 3a, etc. , contains a spring such as 7.

The assembly is easy to understand and leaves, at one of the ends of the bracelet, holes 10a at the two ends of the Body 1a, and at the other end, the gouges. batteries <B>9f,</B> of the two Rotating Organs 2 f and<B><I>3f.</I></B>

Seen in profile, three of the links of this assembly will appear as represented in fig. 4. We see there the three rotating organs <I>2a, 2b,</I> 2c and the three central bodies 1a, 1b, 1c, which assemble the pivot axes 9a-10b and 9b-10c, in leaving, as has been said, on the left the holes 10a and ä, on the right the pins 9c.

Mixed lines linking, for each link, the Faxe projection of the central Body to the projections of the axes; of articulation corresponding to the following and pre-dent link, form Vs articulated between them by the free extremities of their branches, which form between them, equal angles such as x.

The springs of the links exerting a torsion in the direction which seeks to bring 10a closer to 9u, 10b to 9b and so on, therefore sofft to make the various angles x as small as possible, the links considered tend to approach one from the other, which further facilitates the particular Profile gives to the Constituent Parts which present a Curved Point, & - in such a way that each curve of it can be applied without play on the rounding of the neighboring Part (see figs 1 and 4).

The extension of the bracelet thus constituted produces the rotation in opposite directions to one another of the Central Body and of the Rotating Organs of each link, which tends to open them. V until they bring their branches into alignment, as they are in fig. 5, which corresponds to as far as possible from the three links in FIG. 4. This extension taking place against the action of the torsion springs. links, it is obvious that left to themselves, the latter will always tend to resume the constricted position according to fig. 4, sofft to bring back the constituent elements of the bracelet in the position corresponding to the shortest dimension of the 6th last.

Dann the second form of execution according to the perspective of FIG. 6, a series of cylinders, alternately of larger and smaller diameter, are connected together by rods.

The large cylinders are designated by 11, 12, 13, 14 and the thinnest by 15, 16, 17. 0n sees that the first cylinder 12, for example, door articulated on its axis, two rods 18 and 19 forming a < B>V,</B> adopts the free ends of the branches are each articulated at the free end of a branch of a similar V of a neighboring cylinder or link.

As in the example according to fig. 1 to 5, each link will contain one or more elastic members tending to rotate the connecting rods so as to seek to tighten the branches of the Vs which they form between them.

The small cylinders 15, 16, 17 could be eliminated, they primarily play an aesthetic role, that of filling the spaces between the links 11, 12, 13, 14, in particular when the bracelet is extended.

fig. 6 represents only one end of the assembled cylinders. It is obvious that the other end conforms and is assembled in exactly the same way. The third form of execution, se-Ion los fig. 7 and 8, is similar to the previous one; but the connecting rods, instead of extending over a radius, each occupy a diameter, which gives the assembly of these connecting rods the appearance of an articulated crosspiece. The joints of the connecting rods to the links such as 20 will also be subjected to the action of an elastic member tending to rotate them in the direction of the shortening of the bracelet, while their joints between them are joined together two by two by a Small cylinder With the tolle bar 21 has the purpose, before your aesthetic, is to fill the space between the links 20 when the bracelet is extended, as shown in FIG. B.

The bracelet described will preferably be made of metal, but it could also be made of one or more other materials suitable for easy construction.

Claims (1)

R, EVENDICATION: Extensible bracelet, characterized in that each of its links has at least two rotary organs, couxial each comprising at least one eccentric pivot by which it is articulated to one of the rotary organs: a neighboring link, 61astic means constantly tending to impart to said rotary members a reciprocal rotational movement to bring the points of articulation closer to each other and, consequently, to shorten the bracelet. 1. Bracelet according to claim, characterized in that the geometric radii leading from the common axis of the rotary members to the eccentric pivots form, in projection, a series of Vs articulated to one another by the free extremities of their branches, the said elastic means tending to reduce the angle formed by the branches of each V, while the extension of the braeedet produces an increase in the said angles, against the action of these means. . Bracelet according to claim and sub-claim 1, characterized in that the profile of the cross-sections of the rotating members is oblong in shape. 3. Bracelet according to claim and sub-claim 1, characterized in that each link comprises a central element of elongated and hollow shape, containing at least one 61astic member attacking two covers rotatably mounted at the two ends of said central 616ment, for the first purpose to give them a rotational movement relative to the latter, each cover, of a link Uant eccentrically articulated to the central element of the following link, and these elements, when the first bracelet has the minimum length, coming to be placed parallel side by side. 4. Bracelet according to claim and los RTI ID="0003.0271" WI="30" HE="4" LX="1088" LY="954"> subclaims 1 to 3, characterized in that the elastic member also exerts an axial traction on the lids, and in that the eccentric pins of the latter can engage in a corresponding eccentric hole of a neighboring central element. 5. Bracelet according to claim ei and sub-claim 1, characterized in that the branches, V's are materialized by artcu16es rods. 6. Bracelet according to claim and los sub-claims 1 and 5, characterized in that, quo los points of articulation of the free ends of the rods of two successive links are interconnected by a transverse bar. 7. Bracelet according to claim, characterized in that each link comprises diametrical rods pivoted to similar rods of neighboring links, so as to form an articulated brace. B. Bracelet according to claim 7 and sub-claim 7, characterized in that all the points of articulation of the free ends of the connecting rods between them are connected two by two by transverse bars.